Tool-holder



G. A. TAYLOR.

TOOL HOLDER.

APPLICATION FILED SEPT. I5, I9I5.

1 1 9 3,9415 Patented Aug. 8, 1916.

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GEORGE A. TAYLOR, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO HAROLD J. GOEPPER, OF CATMBRIDGE, MASSACHUSETTS.

TOOL-HOLDER.

Specification of Letters Patent.

Patented Aug. 8, 1916.

Application filed September 15, 1915. Serial No. 50,776.

T0 at whom it may concern Be it known that I, Gnoncn A. TAYLOR, a citizen of the United States, residing at Boston, county of Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Tool-Holders, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to tool holders or posts and has for its object a new and 1m proved form of holder which is designed particularly to be used in connection wlth machines such as lathes or the like, in which one or more tools are required to be adjusted in various positions. Heretofore so far as known to me holders of this type have been so constructed that when a plurality of them are employed a relatively large amount of space is required to prevent their interfering with each other. Holders as heretofore constructed therefore, are not adapted to be employed for multiple tool work where a gang of tools are required to be placed in a relatively small amount of space. This either necessitates a number of operations by a single tool which greatly increases the cost of production or makes it necessary to produce a special holder for each given case, which is in itself expensive to produce and is adapted only for the work for which it is particularly designed.

The device embodying my invention is so constructed that a number of holders may be compactly arranged in a relatively small provided with a clamping member which is so arranged and constructed that it affords a better bearing surface than those of holders heretofore constructed thereby reducing the tendency of the clamping member to wear. Furthermore the clamping member is detachably secured to the holder so that it may be readily replaced after having become worn and is so arranged that after the holder has been clamped to the machine pressure on the tool tends to further clamp it in position which insures the holder against slippage on the cross slide of the lathe.

The invention will be fully understood from the following description when taken in connection with the accompanying drawings and the novel features thereof will be pointed out and clearly defined in the claims at the close of the specification.

In the drawings,Figure 1 is an elevation in section showing a tool holder embodying my invention on the cross slide of a lathe. Fig. 2 is a transverse section of a holder embodying my invention. Figs. 3 and 4 are views in perspective of a pillow block and of one of the clamping members respectively with which the tool holder is provided.

Having reference to the drawings there is shown at 11 a portion of the cross slide of a lathe which is provided with the usual T-shaped groove 12 for the reception of a clamping member 13 with which the tool holder is provided. The term cross-slide as employed herein is intended to refer to any slotted member of a machine to which it is desirable to secure a tool holder.

The tool holder consists of a base 14 and a head 15 of the shape shown in Figs. 1 and 2, which are connected by means of side members 16 and 17 having an opening 18 between them in which the tool 19 is received. In the head 15 are a plurality of screws 20 which pass through and project below the head and are provided with rounded ends 21 for engagement with the tool. The clamping member 13 is 'T-shaped in cross section and is substantially square in horizontal section. It is provided with a threaded hole for the reception of a screw member 22 with which the base 14 is provided and is adapted to be loosely received within the slot 12 of the lathe cross slide 11. A clamping member 23 and a pillow block 24 are located in the opening 18 in the tool holder with their ends projecting at the. sides of the opening as shown. The clamping member 23 is recessed at 25 to span the base member 14 and is provided with a conveX are shaped surface 26 and with fiat bearing surfaces 27 and 28, the latter being adapted to rest on the cross slide 11 of the interfering one with the other.

lathe. The pillow block 24: is mounted on the clamping member 23 being provided at its ends with concave bearing surfaces 29 and 30 which correspond to the convex are shaped surface 26 of the clamping member. The central portion of the block 24 is spaced apart from the clamping member 23 and from the tool 19 resting on the block by recesses 31 and 32 respectively.

The construction hereinabove described enables the block 24 to be positioned on the clamping member 23 so that the upper surface of the block is horizontal as shown in Fig. 1 or at any angle required to give to the tool the proper vertical adjustment. At the same time the threaded connection with the clamping member 13 allows the tool holder to be turned to give to the tool the horizontal angle required. When the tool and holder have been thus positioned the screws 20 are turned down against the tool which operates to draw the clamping members 13 and 23 together to clamp the tool holder firmly to the cross slideof the lathe. The threads on the member 22 are so arranged that when pressure is brought to bear on the tool 19 such pressure tends to draw the clamping members together and further clamp the tool holder more securely in the given position. By this construction, therefore, the position of the tool holder on the cross slide is insured and the danger of slippage entirely eliminated.

The convex are shaped surface of the clamping member 23 enables the pillow block 24: to be adjustably mounted on it and at the same time allows the clamping member to be located within the space 18 between the base and the head. The convex arc shaped surface leaves sufficient material at the central portion of the clamping member to form the recess 25 which permits the clamping member to span the base of the tool holder as described. This does away with the necessity of using the ring type of pillow block heretofore employed and makes it possible to place a number of tool holders closely together without Where a number of tools are essential to a given operation as for example in cutting gears, pulleys, or the like, the tool holders may be placed sufficiently closely together so that a gang of tools may be set up for the operation needed. I regard this as an important feature of my invention for the expense in factory production is thus greatly decreased.

The clamping member is substantially rectangular in horizontal section as stated above. This construction affords relatively large bearing surfaces which increases the wearing qualities of the member. Being detachably connected to the base the clamping member may be readily replaced after having become worn thereby obviating the necessity of replacing the whole tool holder. Furthermore clamping members may be produced which are suitable for lathe slots of various sizes which adapts the holder for use on any machine. I regard this as an important feature of my invention for the cost to a manufacturing plant of supplying the number of tool holders required and of keeping them in repair is greatly diminished.

What I claim is:

1. In combination with a tool holding slide of a lathe having a tool slot therein with inwardly projecting shoulders at the sides thereof, a tool holder comprising a head and a base having a transverse opening between them in which a tool is received, said base being located above the said shoulders, a member secured tosaid base andextending into said slot, a clamping member in said slot which is secured to said member, said parts being arranged to permit the said tool holder to swivel, a second clamping member which extends through the said opening and spans the said base and rests on the said tool holding slide at the sides of said slot, and means for forcing the tool downwardly and bringing pressure to bear on the said second clamping member whereby the said clamping members are held forcibly against the tool holding slide.

2. In combination with the tool holding slide of a lathe having a slot therein, a tool holder comprising a head and base between which a tool is received, a shank secured to.

said base and extending into said slot, a clamplng member in said slot havlng a swivel connect on wlth sald shank, a second clamping member spanning the base of the tool holder which rests on the slide of the lathe and is supported entirely by the said slide, and means for forcing the tool downwardly and bringing pressure to bear on the second clamping member whereby said clamping members are held forcibly against the slide.

3. In combination with the tool holding slide of a lathe having a slot therein, a tool holder having a head and base between which a tool is received, a connecting member secured to said base and projecting into said slot, a clamping member in said slot having a swivel connection with said connecting member, a second clamping member having a recess therein into which said base is received which rests on the slide of the lathe, and means for forcing the tool downwardly and bringing pressure to bear'on the second clamping member whereby said clamping members are held forcibly against the slide.

4;. In combination with the tool holding slide of a lathe having a slot therein, a tool holderv comprising a head beneath which a tool is received and a base secured to said head and located above the tool holding slide of the lathe, a clamping member in said slot, a connecting member secured to said base which projects into said slot and has a swivel connection with said clamping member, a second clamping member which rests upon the said tool holding slide and has a recess therein for the reception of said base, and means for forcing the tool downwardly and bringing pressure to bear on the said second clamping member whereby said clamping members are held forcibly against the tool holding slide.

5. In combination with the tool holding slide of a lathe having a slot therein, a tool holder having a head and base between which a. tool is received, a connecting member secured to said base and extending into said slot, a clamping member in said slot rotatably connected with said connecting member, a second clamping member having a convex upper surface and end portions which rest on said slide, and having a recess in the central portion thereof for the reception of said base, a pillow block having a concave surface which cooperates with the convex surface of the said second clamping Copies of this patent may be obtained for member upon which the tool is mounted, and means for forcing the tool downwardly and bringing pressure to bear on the said second clamping member whereby said clamping members are held forcibly against the tool holding slide.

6. In combination with the tool holding slide of a lathe having a slot therein, a tool holder comprising a head and base between which a tool is received, a connecting mem ber secured to said base and projecting into said slot, a clamping member in said slothaving a threaded connection with said con necting member, a second clamping member spanning said base and resting entirely upon the said tool holding slide at the sides of said slot, and means for forcing the tool downwardly and bringing pressure to bear on the second clamping member whereby the clamping members are held forcibly against the slide.

In testimony whereof I aflix my signature, in presence of two witnesses.

GEORGE A. TAYLOR.

Witnesses:

CAMERON MACLEOD, Anion H. MORRISON.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

